Production of powdered resin and the powdered resin so produced

Details Production of powdered resin and the powdered resin so produced Production of powdered resin and the powdered resin so produced

1980-08-05

1983-09-13

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

521 25, 424 79, 528499, 528502, B01J 4108, A31K 3174

Patent

active

044043465

ABSTRACT:
Powdered synthetic polymeric resin is produced by swelling or shrinking resin particles by contact with water or an organic solvent to introduce strain within the particles and comminuting the swollen or shrunk particles by grinding them in a rotary attrition mill. This process is particularly useful for the production of powdered resins for oral consumption, for example powdered cholestyramine resin, since particle sizes such that 90% by weight and/or number is below 30 microns in average particle diameter in the wet swollen state may be achieved.

REFERENCES:
patent: 2581035 (1952-06-01), Martin et al.
patent: 2677670 (1954-05-01), Kienin et al.
patent: 3980770 (1976-09-01), Ingelmann et al.
H. G. Tanner, Chem. and Ind. Chem., 1957, vol. 49, pp. 170-173.
Schultz et al., I and EC Product, Res. and Devel., vol. 7, No. 2, Jun., pp. 120-125.

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